<!doctype html>
<html lang="zh">
<head>
	<meta charset="UTF-8">
</head>
<body style="width: 300px">	
    <div width="200px">
      <button style="margin:5px 5px 5px 5px" id="con">popup发送消息给content_scripts</button>
      <button style="margin:5px 5px 5px 5px" id="bg">popup调用background的js函数</button>
      <button style="margin:5px 5px 5px 5px" id="bgtocon">background发送消息给content_scripts</button>
      <p><font color="red">请在https://translate.google.cn/网页下调试</font></p>
    </div>
</body>
</html>
<!--<script src="js/po.js"></script>
	不写type='text/javascript' jquery不起作用 why？？？
<script src="js/jquery.js"></script> -->
<script type="text/javascript" src="js/jquery.js"></script>
<script type="text/javascript" src="js/po.js"></script>